Carburetor and carburetor burner for oil gas



- w. H. HOWDEN CARBURETOR AND CARBURETOR BURNER FOR OIL GAS Filed April20, 1929 Sept. 30, 1930 r mmrm? IIIIIIIIIIIIIIJIIIIIII' Patented se t.30, 1930 UNITED STATES.

PATENT OFFICE WILLIAM HAY HOWDEN, OF GLASGOW, SOOTLAND, AS SIGNOR OFONE-HALF TO BURDONS LIMITED, '01 GLASGOW, SCOTLAND CABB'ITBETOB ANDCARBURE'IOB BURNER FOR OIL GAS Application flled April 20, 1929, SerialNo. 356,715, and in Great Britain April 26, 19 28.

This invention relates to oil gas carburetors of the type having innerand outer tubes for the passage of air and a fuel nozzle or nozzles forinjecting fuel therein, in which term oil gas carburetors I also includewhat are termed oil gas carburetor-burners which are of the sameconstruction as the said carburetors but are distinct therefrom in thatthey act not only to atomize oil and mix it with air but also serve asburners for the mixture they produce.

According to the present invention, I provide an oil gas carburetor ofthe type stated in which the fuel nozzle is made in parts, an

, inner part projecting through the inner tube of the carburetor and acomplementary outer part which is separable from the said inner part butis adapted to communicate and constitute therewith the complete nozzle,the outer part of the nozzle being carried by the outer tube, and theinner tube with the inner part of the nozzle being capable of readyremoval and replacement for cleaning and other purposes.

More'specifically, my improved carburetor comprises, in combination, anelbow-shaped casing, a transversely apertu'red outer tube constituting afixed continuation of the said casing, a transversely apertured innertube removably and concentrically supported in the said outer. tube, aninner fuel nozzle portion seated in the transverse aperture of the saidinner tube, a complementary outer nozzle portion adjustably seated inthe transverse aperture of the said outer tube, and a removable door inthe said casing through which the inner tube and inner nozzle portioncan be readily withdrawn and inserted.

Preferably, the outer part of the fuel nozzle is held in place by ascrew coupling, so that the said outer part can be drawn outwards topermit or facilitate the removal of the inner tube by slackening oreasing the said coupling outwards.

The removable door, cover or equivalent may be locked in position bymeans comprising lugs or the like adapted to engage, and be secured in,bayonet slots. If desired, themovable door may be associated with a rodor other support carryingin known manner a helical retarder. The saidtube, also, may be provided with a handle to facilitate its withdrawal.

An embodiment of the invention as applied to an oil gas carburetor willnow be de 65 scribed, by way of example, with reference to the annexeddrawing, which is a View of the carburetor in longitudinal section.

The carburetor comprises an elbow casting 1 having an opening 2 coaxialwith its 60 flanged end 3. An outer tube 4 is rigidly secured to theflanged end 3 of the casting 1 so as to project forwardly coaxial withthe openin 2.

ithin the outer tube 4-, a coaxial inner 85 tube 5 is arranged, the tube5 being provided with helical retarders 6 on the outside of its forwardend and being also adapted to carry the inner part 7 of a two-part fuelnozzle, of which the outer part 8 is held in place in 70 the outer tube4 by a screw-coupling 8.

The interior of the inner tube 5 is provided at the rear end with ahelical retarder 9 which is secured to a rod 9 and is adapted to be slida greater or shorter distance up the tube 5. The rear end of the tube 5has fixed toit a handle 10 which tprojects rearwardly towards theopening 2 o the casting 1.

As will be seen, the fuel nozzle 7, 8 projects into the inner tube 5 atright angles, or substantially at right angles, to the axis thereof, thenozzle being arranged so that its obliquely-shaped end 7 is disposed asshown. \Vhen the parts 7 8 are in place and coupling 8 is screwed down,the outer part 8 bears with a close fit against the inner part 7 thetube 5 being supported by the retarders 6 and 9 so as to resist thepressure of the part 8 on the part 7.

The edge of the casting 1 adjacent to the 9 of openuzg' 2b onthescrewenIofthemdQ,thelugs13 being thereby drawn outwards, as shown, the returnface of the bayonet slots 11.

As will be apparent, the construction described in the ing enables thehelical retarder 9 and the mner tube 5 to be readily withdrawn from thecarburetor whenever desired, and, with equal readiness, the said rts 9and 5 can be re laced in sition. or example, in order to c ean the saidarts, the lates 12 and 14 are removed and t e reer 9 is withdrawn, afterwhich the screweoup 8? of the fuel nozzle is Blackened to 't the outerpart 8 thereof to be drawn whereupon, by gripping the handle 10, innertube 5 can be easi y withdrawn through the opening 2.

I claim: 1. An oil gas carburetor comprising the combination of an outercontaining element,

a tubular inner element arranged within said etmtaining element, airinlet means forsaid eontainin element and inner element, an inner fuenozzle element rejecting at right angles into said inner tu ular elementand having an obliquely-shaped end facing in the direction of the inletair stream, an outer fuel nozzle ada ted tocommunicate with said innerfuel 11 e element, interlocking abutment means on said outer and innerfuel nozzle elements for holding said fuel nozzle elean obliquely-shapedmouth projecting at right angles into the inlet air stream, a separateouter fuel nozzle element situated in m d outer tube and adapted tocommunicate with said inner fuel nozzle element, a screw coupling forholding said outer nozzle element'seated in said outer tube, and aremovable door in said "casing for ready insertion and removal of saidinner'tube and inner fuel nozzle element.

3. An oil gas carburetor comprising the combination of a casing, anouter tube seco-axially with said outer tube; air inlet cured on saidcasing, an inner tube arranged means in said casing, an inner fuelnozzle element gorojectin at right angles into said inner tu and modwith an obliquelyshaped and a separate outer fuel noaale element-sea insaid outer tube and adapted to communicate with said inner fuel nozaleelement, a screw coupling for holding said outer fuel nozzle elementsituated in said outer tube, interlocking means between said inner andouter fuel nozzle elements to hold said inner element in non-rotativeposition, andremovable door means in said casing.

In testimon whereof I aflix m si ure.

1AM HAY H EN.

